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XCCDF
Guide to the Secure Configuration of Ubuntu 18.04
Services
Proxy Server
Proxy Server
An XCCDF Group - A logical subset of the XCCDF Benchmark
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Proxy Server
A proxy server is a very desirable target for a potential adversary because much (or all) sensitive data for a given infrastructure may flow through it. Therefore, if one is required, the system acting as a proxy server should be dedicated to that purpose alone and be stored in a physically secure location. The system's default proxy server software is Squid, and provided in an RPM package of the same name.
Disable Squid if Possible
If Squid was installed and activated, but the system does not need to act as a proxy server, then it should be disabled and removed.